Uniform cross distribution of double flat spray nozzles may be affected by the design of the sprayer

According to EU Directive 2009/128/EC pesticide application equipment must function reliably and be used properly for its intended purpose ensuring that pesticides can be accurately dosed and distributed. The transverse distribution of the spray mixture in the target area must be even, where relevant. Spray jets of double flat spray nozzles are angled forward and backward. Depending on the design of the sprayer and boom height, parts of the equipment get splashed by the angled spray jet. Problems arise with lift masts which are fitted very close to the frame of the sprayer. Solutions might be technical modifications of the boom and tube. If technical changes are not possible, the use of flat spray nozzles on the boom is recommended in the critical area in combination with double flat spray nozzles. Results from sprayer inspection are shown with regard to cross distribution. Oftentimes, the deepness of the scanner patternator is not suitable in order to catch both spray jets of double flat spray nozzles. An upgrade for Herbst scanner patternator SPRAYERTEST 1000 is available. A modified table HV 1000-L with 2m in depth, which is double of the current one, is introduced to deal with that specific problem. An easy replacement of the patternator table in existing operating equipments is suggested.